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The Rhino 530!! Its the only wat to go. Especially if you can get your buddies to get one. They have a feature where it tells you where your buddies are if they have a rhino also. Last year in Montana after I got my deer, my brother was coming to help but couldnt find me, took him way to long to find me. My other buddy that has a Rhino just said I will be there in a bit. Never asked where I was. Just pulled my location and the GPS told him where to go. These units are outstanding!
450T is great, learning to use it prior to start of seasons. I like it alot, has alot of easy to figure functions. Some functions are a bit to get used to as I had the simple versions previously...